Principal, Data Scientist - Converse

About the role

Cortex Team is Walmarts core A.I. conversational platform, powering the vision of delivering the worlds best personal assistants to Walmarts customers, accessible via natural voice commands, text messages, rich UI interactions, and a mix of all of the above via multi-modal experiences. We believe /conversations/ are a natural and powerful user interface for interacting with technology and enable a richer customer experience -- both online and in-store. We are building and designing the next generation of Natural Language Understanding (NLU) services that other teams can easily integrate and leverage, and build rich experiences: from pure voice and text shopping assistants (Siri, [[https://tech.walmart.com/content/walmart-global-tech/en_us/blog/post/walmart-is-building-a-genai-powered-shopping-assistant.html][Sparky]]), to customer care channels, to mobile apps with rich, intertwined, multi-modal interaction modes ([[https://apps.apple.com/us/app/me-walmart/id1459898418][Me@Walmart]]). Whatyou'lldo: We need passionate and seasoned NLP data-scientists to help us improve and evolve our capabilities, considering the full conversational context, multi-modal interactions, and an ever-increasing list of use cases. Come at the right time, and you will have an enormous opportunity to make a massive impact on the design, architecture, and implementation of an innovative, mission critical product, driven by data-science, used every day, by people you know, and which customers love. As part of the emerging tech group, you will also have the additional opportunity of building demos, proof of concepts, creating white papers, writing blogs, etc. Whatyou'llbring: Proficient in Python; solid knowledge of SQL Hands on experience with classical ML models, test/train/evaluation metrics, key parameters/techniques that affect model performance Understanding of relevant statistical measures such as confidence intervals, significance of error measurements, development and evaluation data sets Familiar with NLU/NLP, more recent deep ML models (e.g., Transformers, BERT, Llama, Gpts, Gemini) including safe fine-tuning of these Ability to communicate with model consumers and present results intuitively Experience in identifying patterns, conducting error/ deviation analysis, and optimizing data representation Bachelors degree or certification in Machine Learning, Computer Science, Engineering, Mathematics, Statistics or any other related field Join Walmart and your work could help approximately 220 million global customers live better every week. Yes, we are the Fortune #1 company. But you'll quickly find were a company who wants you to feel comfortable bringing your whole self to work. Our mission spreads far beyond the walls of our stores. Here at the worlds leading retailer, you can make career defining accomplishments, learn new skills, gain experience from virtually every industry and leverage your expertise to innovate at scale, impact millions and reimagine the future of retail. Discover why we are a world leader in technology, culture of belonging, sustainability and community involvement. careers.walmart.com. Equal Opportunity Employer: Walmart, Inc. is an Equal Opportunity Employer By Choice. We believe we are best equipped to help our associates, customers, an

Requirements

• Exposure to real-world, production grade agentic systems
• Familiarity with LLMs serving optimizations and multi-Lo Ra
• Ability to develop experimental and analytic plans for data modeling processes, use of strong baselines, ability to accurately determine cause and effect relations
• Strong attention to detail and exceptional organizational skills
• Proven ability to achieve results in a fast paced, highly collaborative and dynamic work environment
• Hands-on expertise across the full model lifecycle, including data pipelines, extraction, model training, model serving, labeling tools, ML-ops and ad-hoc tooling.
• Ph D in a relevant field (Machine Learning, Computer Science, Engineering, Mathematics, Physics, Statistics or a related field)
• About Walmart Global Tech

Additional Information

Position Summary... What you'll do... We are looking for an experiencedPrincipal Data Scientist to join our emerging tech team. At Walmart Global Tech, we are leading the way in revolutionizing retail throughadvanced technology and data science. Our team of experts is committed to solving current supply chain challenges and conducting research and development to create models thataddress the future requirements of our complex omni-channel international business.

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